I just completed this custom box me and my father built for my G35 Coupe. It is a perfect fit into to back of the trunck (pushed up against the rear seat). The design takes away the small area of the trunk, while it leaves the large area for luggage or what ever else you need. It has the right amount of cubic feet for two JL Audio 10w3v2s. Here are some pics:
they are hosted on imagestation
http://www.imagestation.com/mypictur...ption=In%20car
http://www.imagestation.com/mypictur...%20Seat%20Down
http://www.imagestation.com/mypictur...on=Side%20View
http://www.imagestation.com/mypictur...n=Front%20View

Also, I would post pics here but I don't know how to. When I tryu it doesn't work. Someone please PM me with more detailed instructions.

 

link does not work

 

Sorry, I don't know how to post pics, so until someone tells me I don't know what to do.

 

Nevermind, just figured it out.

 

another

 

last one. Also, I can make duplicates if anyone is interested e-mail me. austin101@comcast.net

 

where are your amps?

 

The JL Audio 500/1 amp will be mounted exeactly between the speakers on the front of the box, and I will probably mount the 300/4 underneath the passenger seat, or possibly some other concealed place.